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公开(公告)号：US11070348B1
公开(公告)日：2021-07-20
申请号：US16716224
申请日：2019-12-16
Applicant: Facebook, Inc.
Inventor： Po-Han Huang , Krishna Gomadam , Brian Dunn , Anubhav Singla , Fan Sun
IPC: H04W56/00 , H04L7/00 , H04L12/733 , H04B7/06 , H04W72/04 , H04W24/08 , H04L12/18 , H04W40/02 , H04J3/06
Abstract: Apparatuses, methods, and systems for synchronizing nodes of a wireless network are disclosed. One method includes identifying synchronization paths between synchronization reference nodes of the wireless network and each non-reference node of the wireless network, wherein each synchronization path includes one or more wireless hops between the synchronization reference nodes and the non-reference node, determining a number of timing slots needed for supporting each of the identified synchronization paths, and selecting at least one of the synchronization paths between each non-reference node and at least one of the synchronization reference nodes based on a number of wireless hops of each of the identified synchronization paths and the determined number of timing slots needed to support each of the identified synchronization paths.
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公开(公告)号：US20190097863A1
公开(公告)日：2019-03-28
申请号：US16174181
申请日：2018-10-29
Applicant: Facebook, Inc.
Inventor： Krishna Gomadam , Djordje Tujkovic
Abstract: Apparatuses, methods, and systems for dynamic bandwidth allocation are disclosed. One method includes communicating, by a plurality wireless nodes, with each other through a plurality of wireless links, and wherein each wireless link of the plurality of nodes is assigned a specific symbol phase rotation based on a classification of the wireless link, constructing, by a node, a packet including data that is to be transmitted to a receiving node in the wireless network, wherein the constructed packet includes a plurality of symbols, retrieving the specific symbol phase rotation based on the classification of the specific wireless link over which the plurality of symbols are to be transmitted over, rotating a phase of each successive symbol based on the specific symbol phase rotation of the specific wireless link, and based on a position of the symbol within the constructed packet, and controlling transmission of the constructed packet.
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公开(公告)号：US20190075044A1
公开(公告)日：2019-03-07
申请号：US16174796
申请日：2018-10-30
Applicant: Facebook, Inc.
Inventor： Krishna Gomadam , Djordje Tujkovic , Sanjai Kohli
IPC: H04L12/721 , H04B7/06 , H04B7/08 , H04L12/24 , H04L12/26
Abstract: A wireless communication network includes a transmitting node and a receiving node configured to transmit and receive packets between the transmitting node and the receiving node through one or more of a plurality of predetermined micro-routes is disclosed. For an embodiment, the transmitting node is configured to retrieve a first micro-route, transmit packets in a first transmit beamforming direction associated with the first micro-route, transmit packets including one or more training signals in a second transmit beamforming direction associated with a second micro-route of the plurality of predetermined micro-routes that is different than the first transmit beamforming direction associated with the first micro-route, and receive feedback from the receiving node indicating that the second micro-route provides a better communication link than the first micro-route.
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公开(公告)号：US10116375B2
公开(公告)日：2018-10-30
申请号：US15604943
申请日：2017-05-25
Applicant: Facebook, Inc.
Inventor： Sanjai Kohli , Djordje Tujkovic , Krishna Gomadam
Abstract: A procedure to establish a link in a directional wireless system where two nodes cannot listen to each other unless optimized beamforming pair is used and timing and framing synchronization is acquired. The procedure determines a set of beamforming pairs that the nodes can use for communication in addition to acquiring the framing and timing synchronization. Training packets are periodically transmitted by a transmitter while a receiver listens in each of a number of receive directions. Training packets are sent N times in N directions while a receiver listens in each of M receive directions until all N×M possible transmit and receive direction pair possibilities are tried. The receiver informs the transmitter which transmit and receive direction pairs were successful in creating communication links between the nodes.
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公开(公告)号：US09787373B1
公开(公告)日：2017-10-10
申请号：US15196414
申请日：2016-06-29
Applicant: Facebook, Inc.
Inventor： Sanjai Kohli , Djordje Tujkovic , Krishna Gomadam
CPC classification number: H04B7/0408 , H04B1/1027 , H04B1/1036 , H04B7/0617 , H04W8/005 , H04W24/02 , H04W88/10
Abstract: Apparatuses, methods, and systems of a hybrid node are disclosed. One embodiment of the hybrid node includes a first sector and a second sector. The first sector is operative to transmit a signal through a predetermined transmission channel at each of a first plurality of transmit beam forming settings. The second sector is operative to receive the signal through the predetermined channel at a second plurality of receive beam forming settings for each of more than one of the first plurality of transmit beam forming settings. Further, the node is operative to measure a received signal quality of the received signal at each of the second plurality of receive beam forming settings of the second plurality of antenna elements, for each of the more than one of the first plurality of transmit beam forming settings of the first plurality of antenna elements.
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Patent Agency Ranking
公开(公告)号：US10757743B2
公开(公告)日：2020-08-25
申请号：US16174651
申请日：2018-10-30
Applicant: Facebook, Inc.
Inventor： Djordje Tujkovic , Krishna Gomadam , Vish Ponnampalam
IPC: H03G3/00 , H04B10/294 , H04W76/14 , H04K3/00 , H04W28/04 , H04L27/26 , H04L25/02 , H04B1/10 , H04L25/03
Abstract: Methods, apparatuses, and systems for packet detection in a point-to-point wireless communication network is disclosed. One method includes receiving, by a receiving node, a plurality of packets, adjusting, by an adjustable gain amplifier of the receiving node, a power level of the received plurality of packets, controlling, by a gain control module, a gain of the adjustable gain amplifier, thereby controlling the power level of the received plurality of packets, monitoring the controlled gain of the gain control module over a period of time, identifying a timing of reception of interfering packets based on the monitoring of the controlled gain of the gain control module over the period of time, and adjustably controlling, by the gain control module, the gain of the adjustable gain amplifier based on the identified timing of reception of the interfering packets.
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公开(公告)号：US20190239139A1
公开(公告)日：2019-08-01
申请号：US16383587
申请日：2019-04-13
Applicant: Facebook, Inc.
Inventor： Krishna Gomadam , Djordje Tujkovic , Sanjai Kohli
Abstract: Apparatuses, methods, and systems for charactering and selecting micro-routes between nodes of a wireless network are disclosed. One method includes characterizing a plurality of micro-routes between the first node and the second node, wherein the plurality of micro-routes includes a micro-route and at least one other micro-route, including directing a first beam formed by antennas of the first node to a plurality of directions, for each of the plurality of directions of the first beam, directing a second beam formed by antennas of the second node to a plurality of directions, characterizing a link quality between the first node and the second node for each of the plurality of beam directions of the first beam and each of the plurality of beam directions of the second beam, classifying a plurality of clusters of characterized link qualities that include characterized link qualities greater than a threshold.
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公开(公告)号：US10356826B2
公开(公告)日：2019-07-16
申请号：US15196340
申请日：2016-06-29
Applicant: Facebook, Inc.
Inventor： Djordje Tujkovic , Krishna Gomadam , Sanjai Kohli
Abstract: Apparatuses, methods, and systems of a node that supports a simultaneous bidirectional wireless link with a second node are disclosed. One embodiment of the node includes a first sector that includes a first transceiver and a first plurality of antennas operative to form a beam directed to a first sector of a second node. The node further includes a second sector that includes a second transceiver and a second plurality of antennas operative to form a beam directed to a second sector of the second node. For at least one time slot of a plurality of time slots, one of the first transceiver or the second transceiver is operative to transmit a first communication signal to the second node while the other of the first transceiver or the second transceiver is operative to receive a second communication signal from the second node.
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公开(公告)号：US10193648B2
公开(公告)日：2019-01-29
申请号：US15248297
申请日：2016-08-26
Applicant: Facebook, Inc.
Inventor： Krishna Gomadam , Djordje Tujkovic , Vish Ponnampalam
Abstract: Apparatuses, methods, and systems of mitigating packet interference are disclosed. One method includes receiving, by a sector, data to be transmitted over a specific wireless link of a wireless network, configuring a packet for transmission over the specific wireless link, wherein the packet includes a preamble, and the data, and transmitting, by the sector, the configured packet over the specific wireless link. Configuring the packet includes identifying a reference sequence based on the specific wireless link, and inserting the reference sequence into at least a portion of the preamble.
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公开(公告)号：US10149337B2
公开(公告)日：2018-12-04
申请号：US15382685
申请日：2016-12-18
Applicant: Facebook, Inc.
Inventor： Djordje Tujkovic , Krishna Gomadam , Vish Ponnampalam
Abstract: Methods, apparatuses, and systems for transmitting information between nodes in a point-to-point wireless communication network is disclosed. One method includes constructing, by a sector of a transmitting node, a packet including data that is to be transmitted to a receiving node in the wireless network, wherein the constructed packet includes a short training field, a channel estimation field, a header field, and a data payload, and transmitting by the sector of the transmitting node, a jamming code before the short training field of the constructed packet, thereby reducing a likelihood that the receiving node will decode a different short training field of an interfering packet before the receiving node decodes the short training field of the constructed packet.
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